ACI Aggregate Testing Technician - Level 1 -
Section 2
Unless the procedures recommended here are carried out precisely, a ____
sample can result.
Nonrepresentative
Generally speaking, small samples are most representative of the total supply.
True or False?
False; large samples are more representative
There are some instances in which ____ between the test samples can't be
avoided.
Differences
When reduction of the field sample before testing isn't recommended, the ____
field sample should be tested.
Entire
What determines whether large-size particles are equally distributed among test
samples that have been reduced?
Laws of chance
Method A, the ____ method, must be used with fine, dry aggregate.
Mechancal·splltter
If Method B or C is to be used, ____ the sample.
Moisten
If Method A is to be used and the sample is wet, ____ the sample.
Dry
Method C, miniature stockpiling, cannot be used for ____ or mixtures of coarse
and fine aggregate.
Coarse aggregates
Method ____ involves the use of chutes, holding receptacles, and hoppers or
straightedge pans.
A
Sample splitters must have ____ equal width chutes for coarse aggregate and
____ for fine aggregate.
8, 12
The differences or variations in the procedures of Method B are based on the
____ of the floor surface.
Evenness
In Methods B and C the sample is shoveled into a ____ before it is flattened and
divided.
Conical pile
In using the alternate procedure in Method B, the field sample may be placed on
a(n) _____.
Canvas blanket or tear-resistant tarp
In quartering, retain two ____ quarters and reject the other two.
Diagonally opposite
Section 2
Unless the procedures recommended here are carried out precisely, a ____
sample can result.
Nonrepresentative
Generally speaking, small samples are most representative of the total supply.
True or False?
False; large samples are more representative
There are some instances in which ____ between the test samples can't be
avoided.
Differences
When reduction of the field sample before testing isn't recommended, the ____
field sample should be tested.
Entire
What determines whether large-size particles are equally distributed among test
samples that have been reduced?
Laws of chance
Method A, the ____ method, must be used with fine, dry aggregate.
Mechancal·splltter
If Method B or C is to be used, ____ the sample.
Moisten
If Method A is to be used and the sample is wet, ____ the sample.
Dry
Method C, miniature stockpiling, cannot be used for ____ or mixtures of coarse
and fine aggregate.
Coarse aggregates
Method ____ involves the use of chutes, holding receptacles, and hoppers or
straightedge pans.
A
Sample splitters must have ____ equal width chutes for coarse aggregate and
____ for fine aggregate.
8, 12
The differences or variations in the procedures of Method B are based on the
____ of the floor surface.
Evenness
In Methods B and C the sample is shoveled into a ____ before it is flattened and
divided.
Conical pile
In using the alternate procedure in Method B, the field sample may be placed on
a(n) _____.
Canvas blanket or tear-resistant tarp
In quartering, retain two ____ quarters and reject the other two.
Diagonally opposite
